Resin Identification Codes
Also called: RIC, recycling symbols, plastic codes 1 to 7
Resin identification codes are the numbers 1 to 7 marked on plastic products to show the type of polymer used, helping sorting and recycling.
Resin identification codes (RIC) are numbers from 1 to 7, usually shown inside a triangle on plastic products and packaging, that identify the main polymer. They help collectors, sorters and recyclers separate plastics. The symbol identifies the material only; it does not mean the item is recyclable everywhere.
The seven codes
- 1: PET
- 2: HDPE
- 3: PVC
- 4: LDPE (including LLDPE)
- 5: PP
- 6: PS, including GPPS, HIPS and expanded polystyrene
- 7: Other, including ABS, PC, nylon, multilayer and mixed materials
Why it matters when buying recycled plastic
- Codes help suppliers sort post-consumer material, but not all products are marked and some are marked wrongly.
- Code 7 covers many different plastics, so always confirm the exact polymer.
- Codes do not tell you the grade, such as blow or injection, or the filler level. Use tests like MFI and density for that.
- Product marking is also linked to packaging obligations under EPR.
Treat the code as a useful first clue, then confirm the polymer and grade through supplier information, simple tests and trial processing before buying in volume.